-87.25% is the change from 510 to 65
Calculation steps:
[( 65 - 510 ) ÷ 510] x 100 = -87.25%
Formula
Percentage change = [(65 - 510) / 510] x 100
Subtract the new number by the original number
65 - 510 = -445
-445 ÷ 510 = -0.8725490196078431
-0.8725490196078431 x 100 = -87.25%